John Gill Commentary 2 Kings 20:1

"In those days was Hezekiah sick unto death. And Isaiah the prophet the son of Amoz came to him, and said unto him, Thus saith Jehovah, Set thy house in order: for thou shalt die, and not live." — 2 Kings 20:1 (ASV)

In these days was Hezekiah sick unto death,.... Of this sickness of Hezekiah, the message of the prophet Isaiah to him, and his prayer upon it, See Gill on "Isaiah 38:1–3."